Suddenly one of my MS Outlook folders appears to be empty. All of the email stored here just disappeared yet the folder shows bold face that there is unread mail in it...and I know that is true because I dropped email in the folder. Yet the folder is blank...I know there are 50 or so undeleted messages in there but the folder shows blank. This is on an Exchange Server system.

One other hint...I can choose a "select all" from the pull down which indicates something is in there. Empty folders do not display "select all" when they are truly empty. All other folders are fine. Any ideas anyone?